a harvard drop-out, where he got his vision already, and also prove he got the IQ at least.
ballmer also from harvard,
let's try this one, how many successful start-ups (+ 1 billion revenue)'s founder are graduated from 50+ ranked colleges?
I bet I will find more than you do.

nope, I think it also depend on the type of industry, very innovative or stable.
for company like pepsi a mba will work, for google it need a professional otherwise it will get losted very fast. imagine MS without bill gates? win8 almost killed it already.

what is vision?
for example, to be a US president it need vision, decent understanding of history, global politics etc.
most US president have ivy league background which has the enviorment and resources to build such kind of vision. although they become president maybe 30 years after graduation the foundation is still critical...

It is very difficult to leave behind a cash cow strategy. It is even more difficult to KNOW where markets are driving technology. The landscape is littered with many an intelligent bet gone sour.
Intel has done better than most in not getting too far behind the curve.